本视频对应复杂句子分析实践案例:
- Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated to be 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.
- Building on civilizations that preceded them in coastal Peru, the Mochica developed their own elaborate society, based on the cultivation of such crops as corn and beans, the harvesting of fish and seafood, and the exploitation of other wild and domestic resources.
